13012221545 has 8 divisors (see below), whose sum is σ = 15615348360. Its totient is φ = 10409322240.

The previous prime is 13012221479. The next prime is 13012221569. The reversal of 13012221545 is 54512221031.

It can be written as a sum of positive squares in 4 ways, for example, as 8513568361 + 4498653184 = 92269^2 + 67072^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13012221545 - 2¹⁰ = 13012220521 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117635 + ... + 199655.

It is an arithmetic number, because the mean of its divisors is an integer number (1951918545).

Almost surely, 2^13012221545 is an apocalyptic number.

It is an amenable number.

13012221545 is a deficient number, since it is larger than the sum of its proper divisors (2603126815).

13012221545 is an equidigital number, since it uses as much as digits as its factorization.

13012221545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113755.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 13012221545 its reverse (54512221031), we get a palindrome (67524442576).

The spelling of 13012221545 in words is "thirteen billion, twelve million, two hundred twenty-one thousand, five hundred forty-five".